Di-isopropyl carbonyl compounds



Patented Sept. 16, 1930 UNITED STATES ANGELO KNOB-B, OI BERLIN, AND ALBERT ASBIGNORS '10 WINTHROP CHEMICAL POBATION 017' NEW YORK 001mm, me, or new 7031:,

wmsnmaoim, or rorsnnr, Gunny, u. 1., 4 connI-Isornorn. cannon conrormns ll'o Drawing. Application filed July 5, 1928, Serial Io. 290,093, and in Germany July 7,

The present invention relates to the new aromatic di-isopropyl-carbonyl compounds of the general formula on em CE 1* CH. R being an aromatic radicle and X meaning hydrogen or an univalent radiole.

These componds are very valuable perfumes of a profoundly different character of the odor as compared with the odor of per fumes which contain no or only one isopropyl group. The odor generally spoken is similar that of musk grain oil.

The new compounds may be obtained for instance by introducingby any known method a carbonyl group into an aromatic hydrocarbon containing two isopropyl groups. They may also be manufactured by simultaneously introducing an isopropyl group and a carbonyl-group into a mono-isopropylaryl compound or by converting an aromatic carbonyl compound which contains no or only one isopropyl group into the corre sponding di-isopropyl compound. In carrying out these reactions for example as starting material there may be used aromatic hydrocarbons substituted by one or three isopropyl groups; on account of splitting or condensation reactions di-isopropyl compounds are formed being substituted by the carbonyl-group.

The following examples, the parts being by weight, illustrate without limiting the invention in what manner the new compounds can be manufactured.

Emample 1.Into 15 parts of di-isopropylbenzene of boiling point 204 to 208. C. are introduced 10 parts of aluminium chloride and 1 part of cuprous chloride. Carbonmonoxide is passed through the mass at ordinary or raised temperature until no further gas is ab sorbed. There is thus obtained di-isopropylbenzaldehyde oB 0 131-011 011/ I \CE':

O=CH of'boiling point 147 to 153 C. at 12-13 mm.

1927. pressure, in the form of a thick, colorless liquid. The operation may be conducted at ordinary or raised pressure with or without the aid of gaseous hydrochloric acid. 1

Example .'?.-To a solution of 15 parts of 4-isopropylbenzaldehyde (cuminic aldehyde) and 10 parts of 2-chloropropane (isopro chloride) in 30 parts of carbon bisul de thereare added in portions at 1520 parts of aluminium chloride. The whole is Y heated for some time at 40 C. B working up the mixture in known manner t ere is obtained a good yield of di-isopropyl-benzaldehyde mentioned in Example 1. 7

Example 51-15 partsof isopropyl-benzene (cumene) are mixed with 10 parts of aluminium chloride and 1 part of cuprous chloride. Into this, mixture carbon monoxide is introduced until no more is taken up. When the mass is worked up there is obtained in good yield di-isopropyl-benzaldehyde mentioned in Example 1 besides unchanged isopropyl-benzene and benzene formed by a splitting reaction.

Example 4.15 parts of tri-isopropylbenzene of boiling point 120125 O. at 13 mm. pressure are treated with carbon monoxide at 60 C. under an increased pressure in the presence of 9 parts of aluminium chloride and 1 part of cuprous chloride. The thick redbrown reaction product is distilled in a vacuum. There is mainly obtained the di-isopropyl-benzaldehyde mentioned in Example 1.

E wample 5. 15 parts of di-isopropyl-tolueneof boiling point 100-104: C. at 9 mm. pressure are treated with carbon monoxide under an increased pressure in the presence of 9 parts of aluminium chloride and 1 part of cuprous chloride. When worked up the Z1855 yields di-isopropyl-methylbenzalde- CH: on, on.

6 fir in the form of a. colorless oil boiling at 148- 150 C. under 9 mm. pressure.

Example 6'.16 parts of l-iso ropyllmethylbenzene are treated with carbon monoxide at 50-60 C. and an increased pressure in the presence of 9 parts of aluminium chloride and 1 part of cuprous chloride. When distiller in a vacuum from the mass is obtained besides unchanged isopropyLtoluene and besides toluene and di-isopropyl-toluene formed during the reaction as the main constituent of the mixture the di-isopropyl methylbenzaldehyde mentioned in Exam le 5. 9 Example 7.15 parts of di-isopropylxylene of boiling point 110115 C. at 8 mm. pressure are treated with-carbon monoxide at an increased pressure in the presence of 9 parts of aluminium chloride and 1 part of cuprous chloride. The mixture is Worked up and with a good yield di-isopropyl-di-methylbenzaldehyde.

is obtained, a colorless oil boiling at 150-155 C. under a pressure of 9 mm.

Ewa0npZe 8.-15 parts of di-isopropyl-artetrahydronaphthalene of boiling point 143 148 (.1. at 9 mm. pressure are treated with carbon monoxide at an increased pressurein the presence ride and 1 part of cuprous chloride, From the mixture there is obtained a good yield of di isopropyl-ar-tetrahydronaphthaldehyde CH: /CH:

on; on!

o: H a colorless compound having a waxlike consistence at ordinary temperature and boiling at 182-185 C. at 9 mm. pressure.

E wample 9.10 parts of di-isopropyl-benzone of boiling point 204208 C. are mixed with 5 parts of acetyl-chloride, 7 parts of aluminium chloride are added at 12-15 C. and the mixture is warmed for 2-3 hours at 50 C. By distillation in a vacuum with a good yield there is obtained di-isopropylacetophenone CH CHs on-o.mon CH: CH:

1 may be mentioned. The aromatic di-isoprm pyl-carbonyl compounds by reactions may be transformed into other perfumes by ehen'iical conversion of the carbonyl group. Thus for instance from di-isopropyl-benzaldehyde by alkaline condensation with acetone diisopropyl-benzal-aceton is obtained; by oxidation di-isopropyl-benzaldehyde yieldsdiof 9 parts of aluminium chlo transformed into 1-hydroxy-3-di-isopropylphenyl) -propane or homologues thereof.

7 What we claim is 1. The new, aromatic di-isopropyl-carbonyl compounds of the general formula v CH3 I O=C-X B being an aromatic radicle and X meaning hydrogen'or an univalent radicle.

2. The new aromatic di-isopropyl-car bonyl compounds of the general formula,

- on oH--RcH 3 oflg O: --X R being a radicle of the benzene series and X meaning hydrogen or .an univalent radicle. 3. lhe new di-isopropyl-benzaldehyde CH3 CH:

- CH--CaHaCH on, 1 on.

o=o-n being a thick colorless liquid of boiling point 147-153 C. at 12-13 mm. pressure.

In testimony whereof, we aflix our signatures.

. DR. ANGELO KNORR.

DR. ALBERT WEISSENBORN.

CERTIFICATE or CORRECTION. a 3

Patent No. 1, 776, 154.-- v Granted September 16, 1930, m

ANGELO KNORR ET AL.

It is hereby certified that error appears in the above numbered patent requiring correction as follows: In the grant, and in the heading to the printed specification, title of invention should read "Aromatic Di-Isopropyl-Carbonyl Compounds" instead of Di-Isopropyl Carbonyl Compounds; and that the said Letters Patent should be read with this correction therein thatthe same may con form to the record of the ease in the Patent Office.

Signed and sealed this 2lstdayof October, A. D. 1930.

M. J. Moore, I (Seal) Acting Commissioner of Patents. 

